For me it did a few updates ago, now it's pretty much stable. I really do like this release and i can live with not all extentions being enabled on the nightly, but for releasing this to stable users i would think they should first fix the extentions.
For the last few days for me, Firefox Preview Nightly crashes almost immediately but Firefox Preview is still stable. My understanding is that Preview picks up changes from Preview Nightly every two weeks.
(Disclaimer: I work for Mozilla but not on our Android browser)
I hope you’re reporting these...
Yes, I follow Android's prompt to report the crashes.
I don't see them listed in about:crashes though, so I'm unsure how to follow up about them.